Steam-engine



(o Model.) 4 SheetsmSheet 1.

- J. WALRATH.

N. PETERS, Phoxolmhugwher, wnhingwn, D. C.

(No Model.) 4 Sheets-Sheet 2. J. WALRATH.

STEAM ENGINE.

ted July 12, 1887'.

(No Model.) 4 Sheets-Sheet 3.

J. WALRATH.

STEAM ENGINE.

No. 366,440. Patented July 12, 1887.

Invereto.

f gmrmm N. PETERS, Plwxu-Lilhogmpner. wnsnmgmn, D. C

(No Model.) 4 Sheets-Sheet 4.

J. WALEATE.

STEAM ENGINE.

No. 366,440. Patented July 12, 1887.

a l 1| M Il ll :HHH lll! UNITED STATES PATENT EEICE.

JESSE TALRATIL OF RACINE, VISCONSIN.

STEAM- ENGINE.

SPECIFICATION forming part of Letters Patent No. 366,440, dated July 12, 1887.

Application tiled February 1G, 18:7. Serial No. 227,917. (No model.) l

To @ZZ whom, may concern:

Be it known that I, JESSE VALRATH, a citizen of the United States, residing at Racine, in the county of Racine and State of \Visconsin, haveinvented certain new and useful Improvements in Steam-Engines; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates, primarily, to steamengines mounted upon or attached to the boiler.

The leading objects of my invention are to prevent condensation in the cylinders, to produce a construction economical in regard to cost, size of parts, and weight, to provide short steam-passages from the boiler to the engine, to avoid back-pressure, .and to simplify all the parts, thereby lessening the degree of skill and care necessary in driving, and making it possible for one not expcrtin steam-engineering to use my engine with perfect safety andV SUCCESS.

The accompanying drawings fully illustrate my invention and will be referred to in the specification, similar let-ters indicating corre spending parts throughout.

Figure l is a side elevation of my engine and a portion of the boiler to which it is attaehed. Fig. 2 is a rear elevation of the boiler and engine. Fig. 3 is a longitudinal section on dotted line a: a: of Fig. 2. Fig. 4 is a vertical section through the bearings of the main shaft. Fig. 5 is a cross-section through the center of the dome and cylinders. Fig. G is a rear view, with parts broken away, showing one end ofthe combined steam-chest and cylinder-heads. Figs. 7, 8, and 9 are plan, side, and bottom views of the steamvalve.

The saddle or support A is rigidly secured to the top of the boiler G, and firmly mounted upon this saddle, and retained in position by means of bolts and nuts, is the dome B. The Steamcylindcrs D D are located within this dome, and are preferably east in the Same piece with it. rlhe boiler is provided with openings b, b, and b-the latter t0 permit the passage of steam into the dome and the former to act as return-passages and outlets for any water which inay result from condensation within the dome.

The cover of the dome, which in this iustance is made separate and connected to the dome, is provided with a steam-pipe, E, and the steam entering the dome from the boiler is conducted through the pipe E and thc two connected pipes l" F to the steam-chest It.

In the rear of the dome is formed an oil-receptacle and crank-chamber, B', which is separated from the steanrchamber of the dome by the partition A. This chamber is formed in part by the dome and in part by an extension of the saine, A2, and end plate, A, the extension and the end plate being attached to the dome by bolts, or in any other preferred manner. y

G G are conical chambers provided with bearings for the ends of the crankshaft G', and are attached rigidly to opposite sides of the crank-chamber B. Near the center ofthe cranlrchambcr is the support H for the crankshaft. This support is rigidly attached tothe upper and lower walls of said chamber, and is preferably connected to partition A. Itis provided with a recess or curved portion midway its extremities, forming half of the bearing for the shaft, the said bearing being completed and the shaft held in place by the cap l1., bolted tothe main support H. This support may be cast in the s ame piece with the rear extension of the dome.

The shaft G is cranked in opposite directions, as shown in Eig. Ll, and is provided at one end with a fly-wheel, M.

The bearing-boxes G2 GZ are provided with openings g for the admission of oil.

rlhe chamber E is filled wit-h oil to such a depth that the crankarms, when in their lower positions, will dip into the same, and when iu motion will splash the oil, through the openings f near the top of the crank-chamber, into the conical chambers G upon the bearing boxes G2 G2, provided with perforations g. The bearing-boxes do not till the entire space of the conical bearingboxes; hence, in case there should be au excess of oil, it will find its way around the outside of the bearings G2 G2 and drop into the lower part of the chambers G, and finally into the chamber B through the openings g2. These bearingsG2 G2 are closed at their outer ends by stuffing-boxes, as usual.

The oil may be supplied to the crank-chamber by means of an opening, 4, in the top of IOC the chamber, or through the bottle-shaped vent K, which is primarily for the purpose of a1- lowing the escape of air and vapor from the crank-chamber, and the same'is provided with an open ventpipe, K2.

The amount of oil in the chamber B is shown by an oil-gage, L,.of ordinary construction. This gage is' connected with the chamber by the pipe Z. a

The crank-shaft is mounted at right angles to the cylinders D D, and occupies such a position in relation to them that when the crankarms are horizontal the piston-rods attached thereto will pass through the center of the cylinders.

Mounted upon the crank-shaft is the eccen tric-plate and eccentric N, bot-h preferably cast in one piece. This plate is made thicker at the point opposite the eccentric, for the purpose of furnishing a counter-balance for such eccentric and providing an even and easy movement. g v i The single rotary 'slide-valve is constructed substantially as shown in Figs. 3, 7, 8, and 9. This valve is made in two parts, P and P. The part I? is provided with exhaust-pockets and has at each enda circular part accurately fitted to circular recesses in the ends of the valve-chamber. It is also provided with a slot extending from the opposite side to near the working-face of the valve. In this slot is placed the flat central part,]?, which is provided with journals p p', fitting bearings inthe ,ends of the valve-chamber, thejournal p extending through the wall of the chamber. Outside of the chamber the journal p is provided with the crank S, the crank-pin i of which enters a socket on the sleeve S on the rod O, connected to the strap of the eccentric. This rod O is screw-threaded, and at each end of the sleeve there is a nut, s, by which any required adjustment of the sleeve may be secured.

It will be noticed that the steam and exhaust ports of the cylinders are arranged in a peculiar manner. The steam-ports t are arranged on opposite sides of a line running transverselyof the steam-chest, and the exhaustports u are arranged one above and the other below the steanrport of its cylinder, or on opposite sides of the steam-port. The dotted lines in Fig. 6 show the connection with the exhaust-pipe which leads to the smoke-stack.

Thefposition of the exhaust-pockets in the valve I? corresponds to the relative positions of the exhaust-ports of the two cylinders, as

' shownvin Fig. 9.

I construct my piston in two parts, V and V', the latter forming the head or face of the piston. This part Vis provided with lugs o,

to which the piston-rod is pivoted. This arrangement cheapens the construction and enables me to secure an accurate fitting of the parts. The head V is secured to the part V of the piston by bolts, as shown, or in any other secure manner.

I may, if at any time it is found desirable, apply my dome and cylinders to other forms of engines than that shown, and may employ but a single cylinder Whenever it may be found desirable to do so.

What I cla-im, and desire to secure by Letters Patent, is-

l. The combination, with a boiler and dome, of the extension A and end plate, A3, forming the crarilrcllamber, substantially as described.

2. The combination, with the domeprovided with a crank-chamber connected therewith, of the conical bearing-boxes provided with perforated bearings attached toeach side of the same, the said crank-chamber being provided with openings communicating with the inte rior ot' said bearing-boxes, substantially as described.

3. A steam-dome provided with a crankchamber having a central bearing, H h, and the conical bearing-boxes G at each side of said crankchamber, substantially as described.

4. The combination, with a steamdorne, of

two engine-cylinders within said dome, one of said cylinders being attached to and integral with one -of the sides `of said dome and the other attached to and integral with one of the other sides, substantially as described.

5. The combination, with a steam-dome, of I two engine-cylinders within said dome, said cylinders being longitudinally attached to andintegral with two ofthe sides of said'dome, substantially as described.

6. The combination, with two engine-cylinders, a steam-chest connected with each` `of said cylinders, narrow elongated steamports on opposite sides and adjoining aline passing longitudinally through the steamchest, and exhaust-ports located in close rela- -tion to said steam-portsand on opposite sides of the same, of a Valve provided withdexhaustpockets located on opposite sides of aline running longitudinally of the same and in close relation to its closing surface, substantially as described.

7. Two cylinders having steam -ports on opposite sides of and adjoining to a line passing longitudinally through the steam-chest, the said steam-chest having exhaust-ports lo` cated above and below saidsteam-ports, in combination with a single valve having eX- haust-pockets on opposite sides of a line running transversely of saidA valve and on opposite sides of a line running lengthwise ,of the same, substantially as described.

In testimony whereof I affix my signature in presence of two-witnesses.

. JESSE WALRATH.

Witnesses:

' CHARLES H. LEE,

GEO. L. EDDY.

IIO 

